3852A-282-101A

Features n Single-turn (3851 and 3852) n 3-3/4-turn (3856) n Linear and audio tapers n Wide resistance range n Minimal depth package n Good resolution 3851/3852/3856 - 3/4 ” Diameter Panel Control Initial Electrical Characteristics1 3851 3852/3856 Conductive Plastic Element Cermet Element Standard Resistance Range Linear Tapers (A, B, E, and H)......................1 K to 1 megohm................................................ 100 ohms to 1 megohm Audio Tapers (C, D, F, and G).......................1 K to 1 megohm................................................ 1 K ohms to 1 megohm Total Resistance Tolerance................................±10 % or ±20 %................................................. ±5 % or ±10 % Independent Linearity........................................±10 %................................................................. (A & H tapers) ±5 % Absolute Minimum Resistance..........................2 ohms maximum............................................... 2 ohms maximum Effective Electrical Angle...................................(Linear tapers) 250 ° ±5 °.................................... (Linear tapers) 250 ° ±5 ° (Audio tapers) 225 ° ±5 °.................................... (Audio tapers) 225 ° ±5 ° Contact Resistance Variation............................±1 %................................................................... ±3 % of total resistance or 3 ohms (whichever is greater) Dielectric Withstanding Voltage (MIL-STD-202, Method 301) Sea Level.....................................................900 VAC minimum.............................................. 900 VAC minimum 70,000 Feet..................................................350 VAC minimum.............................................. 350 VAC minimum Insulation Resistance (500 VDC).......................1,000 megohms minimum.................................. 1,000 megohms minimum Power Rating (Voltage Limited By Power Dissipation or 350 VAC, Whichever Is Less) +70 °C .........................................................(Linear tapers) 1 watt.......................................... (Linear tapers) 2 watts (Audio tapers) 0.5 watt....................................... (Audio tapers) 1 watt +125 °C........................................................0 watt +150 °C................................................................................................................................... 0 watt Theoretical Resolution.......................................Essentially infinite............................................... Essentially infinite Environmental Characteristics1 Operating Temperature Range........................... -1 °C to +125 °C...................................................-1 °C to +125 °C Storage Temperature Range............................... -65 °C to +125 °C.................................................-65 °C to +150 °C Temperature Coefficient Over Storage Temperature Range............................. ±1,000 ppm/°C......................................................±150 ppm/°C Vibration.............................................................. 20 G.......................................................................20 G Total Resistance Shift.................................... ±2 % maximum.....................................................±2 % maximum Voltage Ratio Shift......................................... ±5 % maximum.....................................................±6 % maximum Shock.................................................................. 100 G.....................................................................100 G Total Resistance Shift.................................... ±2 % maximum.....................................................±2 % maximum Voltage Ratio Shift......................................... ±5 % maximum.....................................................±6 % maximum Load Life............................................................. 1,000 hours...........................................................1,000 hours Total Resistance Shift.................................... ±10 % maximum...................................................±3 % maximum Rotational Life (No Load).................................... 100,000 cycles......................................................20,000 cycles Total Resistance Shift.................................... ±15 % TRS maximum ..........................................±5 % or 5 ohms TRS whichever is greater Contact Resistance Variation........................ ±3 %......................................................................±3 % Moisture Resistance (MIL-STD-202, Method 103, Condition B) Total Resistance Shift.................................... ±10 % maximum ..................................................±2 % maximum IP Rating.............................................................. IP 40......................................................................IP 40 1 At room ambient: +25 °C nominal and 50 % relative humidity nominal, except as noted. WARNING Cancer and Reproductive Harm - www.P65Warnings.ca.gov *RoHS Directive 2015/863, Mar 31, 2015 and Annex. Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.  3851/3852/3856 - 3/4 ” Diameter Panel Control Mechanical Characteristics1 Stop Strength 3851 & 3852................................................................................................................................................................... 56.5 N-cm (5 lb.-in.) 3856...................................................................................................................................................................................... Continuous turn Mechanical Angle..............................................................................................................................................280 ° ±5 ° / 3856 – 1350 ° ±50 ° Torque (Starting and Running).......................................................................................A & B bushings 0.35 to 4.23 N-cm (0.05 to 6.0 oz.-in.) C & E bushings 0.21 to 4.23 N-cm (0.3 to 6.0 oz.-in.) 3856 – 0.11 to 2.12 N-cm (0.15 to 3.0 oz.-in.) Mounting (Torque on Bushing)............................................................................................................ 1.7-2.0 N-m (15-18 lb.-in.) maximum Weight (Single Section)........................................................................................................................................................ 30 grams maximum Terminals................................................................................................................................................. Printed circuit terminals or solder lugs Soldering Condition........................................... Recommended hand soldering using Sn95/Ag5 no clean solder, 0.025 ” wire diameter. Maximum temperature 399 °C (750 °F) for 3 seconds. No wash process to be used with no clean flux. Part can be wave soldered at 260 °C (500 °F) for 5 seconds, no wash process with no clean flux. Marking.......................................................................... Manufacturer’s trademark, wiring diagram, resistance, date code, and part number Ganging (Multiple Section Potentiometers)............................................................................................................................... 1 cup maximum Hardware................... One lockwasher and one mounting nut is shipped with each potentiometer, except where noted in the part number. 1 At room ambient: +25 °C nominal and 50 % relative humidity nominal, except as noted. Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.  3851/3852/3856 - 3/4 ” Diameter Panel Control Product Dimensions 6.35 ± .76 (.25 ± .03) 12.7, 22.23 STD. (1/2, 7/8) 9.53 (.38) 3/8-32 UNEF .25 45 ° X (.010) CHAMFER .38 (.015) 19.05 (.75) DIA. 6.35+.03/-.05 DIA. (.250+.001/-.002) 6.35 ± .76 (.25 ± .03) 3/8-32 UNEF .25 45 ° X (.010) CHAMFER .38 (.015) 19.05 (.75) DIA. SHAFT SLOT 1.19 WIDE X .047 1.60+.38/.00 DEEP (.063+.015/-.000) 12.19 DIA. (.480) 15.88 STD. (5/8) 12.7 (.50) 6.35+.03/-.05 DIA. (.250+.001/-.002) SHAFT SLOT 1.19 WIDE X (.047) 1.60+.38/-.00 DEEP (.063+.015/-.000) 12.19 DIA. (.48) 16.00 5.49 OPTIONAL FLAT (.63) (.216) 1.52 28.58 LONG OR FRONT BUSHING FOR SHAFTS UNDER (.06) (1-1/8) SOLDER LUG TERMINAL 6.35 2.79 TYP. (.25) (.110) 3 PLCS. 12.7 (.50) EACH TERMINAL LUG 2 3 2 PLCS. 1 WILL ACCOMMODATE .72 THREE (.028) DIAMETER 14.02 ± .25 (.724 DIA. AWG (.552 ± .010) STRANDED) WIRES. STANDARD PRINTED CIRCUIT TERMINAL 1.02 6.35 TYP. TYP. (.040) (.25) 15.88 ± .38 (.625 ± .015) 9.53, 22.23 STD. (3/8, 7/8) 6.35 (.25) 6.35 ± .76 (.25 ± .03) .38 (.015) 2.36 (.094) 19.05 (.75) DIA. 1/4-32 UNEF .25 45 ° X (.010) CHAMFER 12.19 DIA. (.480) 1/4-32 UNEF .38 (.015) 3.18 ± .025 DIA. (.125 ± .001) 12.19 DIA. (.480) SHAFT SLOT .79 WIDE X .76 DEEP (.03) (.031) 6.35 ± .76 (.25 ± .03) SHAFT SLOT .79 WIDE X .76 DEEP (.031) (.03) 3/8-32 UNEF 1.19 (.047) 19.05 (.75) DIA. 12.19 DIA. (.480) 1.60+3.81/-.000 (.063+.015/-.000) DIA. 22.23 STD. (7/8) .25 45 ° X (.010) CHAMFER A, B & H BUSHINGS 9.53 (.375) 6.35 ± .76 (.25 ± .03) .38 (.015) 9.53 (.375) 3.18 6.73 DIA. (.125)DIA. (.265) 3.18 DIA. (.125) SHAFT SLOT ALIGNMENT AT CCW 12.7 (.50) 9.53 (.38) 6.35+.03/-.05 DIA. (.250+.001/-.002) .38 (.015) SUGGESTED BOARD LAYOUT 6.35 6.35 (.25) (.25) 9.91 DIA. (.390) 12.7 (.50) 6.35 (.25) 3 1.40 DIA. (.055) .25 OPTIONAL FLAT LONG OR (.010) 1.52 15.88 FRONT BUSHING FOR SHAFTS UNDER (.06) (5/8) 9.53 (.38) .25 45 ° X (.010) CHAMFER 19.05 (.75) DIA. 3.18 ± 0.25 DIA. (.125 ± .001) 2 12.7 STD. (1/2) 9.53 (.38) 6.35 ± .76 (.25 ± .03) 1 6.35+.03/-.05 DIA. (.250 ± .03) FLAT ALIGNMENT AT CCW 50 ° ± 10 ° 50 ° ± 10 ° 3/8-32 UNEF. .79 (.031) 2.67 ± .381 (.105 ± .015) 19.05 (.75) DIA. 12.19 DIA. (.480) .79 ± .25 (.031 ± .010) 22.23 STD. (7/8) DIMENSIONS: MM (INCHES) 3.18 ± .03 (.125 ± .003) DIA. .25 45 ° X (.010) CHAMFER ANTI-ROTATION LUG PROJECTS 1/16 INCH ABOVE MOUNTING FACE. TOLERANCES EXCEPT AS NOTED: .127 .XX ± .38 DECIMALS: .XXX ± (.005), (.015) FRACTIONS: ± 1/64 ANGLE: ± 3 % 1 3 CCW 2 POTENTIOMETER Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.  3851/3852/3856 - 3/4 ” Diameter Panel Control How To Order 3852 A - 12 16 16 20 SHAFT TYPE (FMS) & DIAMETER 3/8 ” (9.53 mm) L X 1/8 ” (3.18 mm) D 1/2 ” (12.7 mm) L x 1/4 ” (6.35 mm) D 1/2 ” (12.7 mm) L x 1/8 ” (3.18 mm) D 5/8 ” (15.88 mm) L X 1/4 ” (6.35 mm) D 28 7/8 ” (22.20 mm) L X 1/4 ” (6.35 mm) D 28 7/8 ” (22.20 mm) L X 1/8 ” (3.18 mm) D 28 2 - 103 A AVAILABLE ONLY IN MODELS 3851, 3852 3851, 3852 3851, 3852 3851, 3852 3851, 3852 3856 3851, 3852 3856 BUSHINGS C A C, E A, B A, B A C, E H Consult factory for lengths not shown. A B C E H BUSHING Plain 3/8 ” (9.53 mm) D x 3/8 ” (9.53 mm) L Locking 3/8 ” (9.53 mm) D x 1/2 ” (12.7 mm) L Plain 1/4 ” (6.35 mm) D x 1/4 ” (6.35 mm) L Locking 1/4 ” (6.35 mm) D x 1/2 ” (12.7 mm) L Plain 3/8 ” (9.53 mm) D x 3/8 ” (9.53 mm) L APPLICABLE MODELS 3851, 3852, 3856 3851, 3852 3851, 3852 3851, 3852 3856 (3.18 mm D Shaft) MODEL 3851 3/4 ” (19.05 mm) D Single-Turn C.P. 3852 3/4 ” (19.05 mm) D Single-Turn Cermet 3856 3/4 ” (19.05 mm) D 3-3/4-Turn Cermet Boldface features are Bourns standard options. All others are available with higher minimum order quantities. TERMINAL STYLE AND SHAFT TYPE 1 2 3 5 6 7 Solder Lugs, Plain End Solder Lugs, Slotted End Solder Lugs, Flatted Shaft PC Pins, Plain End PC Pins, Slotted End PC Pins, Flatted Shaft L RESISTANCE CODE/VALUE (IN OHMS) Model 3851 (102) 1K (252) 2.5 K (502) 5K (103) 10 K (253) 25 K (503) 50 K (104) 100 K (254) 250 K (504) 500 K (105) 1M Models 3852/3856 (101) 100 (251) 250 (501) 500 (102) 1K (252) 2.5 K (502) 5K (103) 10 K (253) 25 K (503) 50 K (104) 100 K (254) 250 K (504) 500 K (105) 1M ELEMENT TAPER/TOLERANCE A Linear ±10 % B Linear ±20 % C Audio CW ±10 % D Audio CW ±20 % E Linear ±10 % F Audio CCW ±10 % G Audio CCW ±20 % H Linear ±5 % RoHS IDENTIFIER L Compliant APPLICABLE MODELS 3852, 3856 3851 3852, 3856 3851 3851 3852, 3856 3851 3852, 3856 REV. 03/19 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.  Legal Disclaimer Notice This legal disclaimer applies to purchasers and users of Bourns® products manufactured by or on behalf of Bourns, Inc. and its affiliates (collectively, “Bourns”). Unless otherwise expressly indicated in writing, Bourns® products and data sheets relating thereto are subject to change without notice. Users should check for and obtain the latest relevant information and verify that such information is current and complete before placing orders for Bourns® products. The characteristics and parameters of a Bourns® product set forth in its data sheet are based on laboratory conditions, and statements regarding the suitability of products for certain types of applications are based on Bourns’ knowledge of typical requirements in generic applications. 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